Stabilized Fly Ash for Use as Low-Permeability Barriers

by John J. Bowders, Jr., West Virginia Univ, Morgantown, WV, USA,
Mumtaz A. Usmen, West Virginia Univ, Morgantown, WV, USA,
James S. Gidley, West Virginia Univ, Morgantown, WV, USA,

Document Type: Proceeding Paper

Part of: Geotechnical Practice for Waste Disposal '87


Two class F fly ashes from power stations located in West Virginia were stabilized by adding various percentages (by weight) of either lime or cement. Test specimens were subjected to compaction, unconfined compression, vacuum saturation durability and hydraulic conductivity tests. Results from the testing showed that adequate strength and durability can be achieved with sufficient stabilizer contents and curing. Hydraulic conductivity decreased with increasing amounts of stabilizer. The findings suggest that stabilized fly ash could serve as an alternative to clay soils in seepage cut-off applications in earthdams, impoundment liners, and landfill liners.

Subject Headings: Recycling | Fly ash | Permeability (soil) | Clay liners | Soil water | Soil stabilization | Soil pollution | West Virginia

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